Rob, it's always nice to get them new in the box like that!
I was wondering if my eyes were beginning to deceive me, then I realised that the U5096 was the biege electronic one with rewind, not the lilac U5094 or the grey U5120 - it just looked so much like the grey one!
The U5094 was the most common - used to see loads of them. I had a nice grey U5120 one and let that go for about £40 some years ago, mind you I'd got it for next to nothing.
The U5132s were a bit of a pain for blocking. Despite selling the odd one I admit that I threw some away and didn't bother to fix them..
Stephen